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Synergistically enhance confined diffusion by continuum intersecting channels in zeolites
In separation and catalysis applications, adsorption and diffusion are normally considered mutually exclusive. That is, rapid diffusion is generally accompanied by weak adsorption and vice versa. In this work, we analyze the anomalous loading-dependent mechanism of p-xylene diffusion in a newly deve...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7954456/ https://www.ncbi.nlm.nih.gov/pubmed/33712464 http://dx.doi.org/10.1126/sciadv.abf0775 |
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author | Liu, Zhiqiang Yuan, Jiamin van Baten, Jasper M. Zhou, Jian Tang, Xiaomin Zhao, Chao Chen, Wei Yi, Xianfeng Krishna, Rajamani Sastre, German Zheng, Anmin |
author_facet | Liu, Zhiqiang Yuan, Jiamin van Baten, Jasper M. Zhou, Jian Tang, Xiaomin Zhao, Chao Chen, Wei Yi, Xianfeng Krishna, Rajamani Sastre, German Zheng, Anmin |
author_sort | Liu, Zhiqiang |
collection | PubMed |
description | In separation and catalysis applications, adsorption and diffusion are normally considered mutually exclusive. That is, rapid diffusion is generally accompanied by weak adsorption and vice versa. In this work, we analyze the anomalous loading-dependent mechanism of p-xylene diffusion in a newly developed zeolite called SCM-15. The obtained results demonstrate that the unique system of “continuum intersecting channels” (i.e., channels made of fused cavities) plays a key role in the diffusion process for the molecule-selective pathways. At low pressure, the presence of strong adsorption sites and intersections that provide space for molecule rotation facilitates the diffusion of p-xylene along the Z direction. Upon increasing the molecular uptake, the adsorbates move faster along the X direction because of the effect of continuum intersections in reducing the diffusion barriers and thus maintaining the large diffusion coefficient of the diffusing compound. This mechanism synergistically improves the diffusion in zeolites with continuum intersecting channels. |
format | Online Article Text |
id | pubmed-7954456 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-79544562021-03-24 Synergistically enhance confined diffusion by continuum intersecting channels in zeolites Liu, Zhiqiang Yuan, Jiamin van Baten, Jasper M. Zhou, Jian Tang, Xiaomin Zhao, Chao Chen, Wei Yi, Xianfeng Krishna, Rajamani Sastre, German Zheng, Anmin Sci Adv Research Articles In separation and catalysis applications, adsorption and diffusion are normally considered mutually exclusive. That is, rapid diffusion is generally accompanied by weak adsorption and vice versa. In this work, we analyze the anomalous loading-dependent mechanism of p-xylene diffusion in a newly developed zeolite called SCM-15. The obtained results demonstrate that the unique system of “continuum intersecting channels” (i.e., channels made of fused cavities) plays a key role in the diffusion process for the molecule-selective pathways. At low pressure, the presence of strong adsorption sites and intersections that provide space for molecule rotation facilitates the diffusion of p-xylene along the Z direction. Upon increasing the molecular uptake, the adsorbates move faster along the X direction because of the effect of continuum intersections in reducing the diffusion barriers and thus maintaining the large diffusion coefficient of the diffusing compound. This mechanism synergistically improves the diffusion in zeolites with continuum intersecting channels. American Association for the Advancement of Science 2021-03-12 /pmc/articles/PMC7954456/ /pubmed/33712464 http://dx.doi.org/10.1126/sciadv.abf0775 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Liu, Zhiqiang Yuan, Jiamin van Baten, Jasper M. Zhou, Jian Tang, Xiaomin Zhao, Chao Chen, Wei Yi, Xianfeng Krishna, Rajamani Sastre, German Zheng, Anmin Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title | Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title_full | Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title_fullStr | Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title_full_unstemmed | Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title_short | Synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
title_sort | synergistically enhance confined diffusion by continuum intersecting channels in zeolites |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7954456/ https://www.ncbi.nlm.nih.gov/pubmed/33712464 http://dx.doi.org/10.1126/sciadv.abf0775 |
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